*{
    margin: 0;
    padding: 0;
    list-style: none;
}
body{
    position: relative;
    width: 100%;
    min-width: 320px;
    max-width: 640px;
    margin: 0 auto;
    font-size: 14px;
    color:#666;
    font-family:-apple-system,Helvetica, sans-serif;
    line-height:1.5;
   background-color:#fff;
   height: 700px;
}
.app{
    display: block;
}
.app ul li{
    float: left;
    height: 45px;
    line-height: 45px;
    background-color: #333333;
    text-align: center;
    color: #fff;
}
.app ul li:nth-child(1){
    width: 8%;
}
.app ul li:nth-child(1) img{
    width:10px;
}

.app ul li:nth-child(2){
    width: 10%;
}
.app ul li:nth-child(2) img{
    width:30px;
    vertical-align: middle;
}
.app ul li:nth-child(3){
    width: 57%;
}
.app ul li:nth-child(4){
    width:25%;
    background-color:orangered;
}
.search-wrap{
    position:relative;
    height: 44px;
}
.search-btn{
    position: absolute;
    top:45px;
    left:0;
    width: 40px;
    height: 44px;

}
.search-btn::before{
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    background:url(../images/hg.png) no-repeat;
    background-size: 20px 18px;
    margin: 14px 0 0 15px;
    
}
.search-login{
    position: absolute;
    right: 0;
    top:45px;
    width: 40px;
    height: 44px;
    line-height: 44px;
    color:#fff;
    
}
.ys{
    width:100%;
    height:80px;
    background-color:brown;
    position: absolute;
    top:45px;
   
}
.search{ 
    display: block;
    position: relative;
    top: 52px;
    height: 30px;
    background-color:#fff;
    margin: 0 50px;
    border-radius: 15px; 

}

.jd-icon{
    width: 20px;
    height: 15px;
    position: absolute;
    top:8px;
    left:13px;
    background:url(../images/jd.png) no-repeat;
    background-size:20px 15px;
}
.jd-icon::before{
    content: "";
    position: absolute;
    right:-8px;
    top: 0;
    display: block;
    width: 1px;
    height: 15px;
    background-color:#ccc;
}
.ysq{
   width: 100%;
   height:130px;
   background-color: brown;
}
.sou{
    position: absolute;
    width: 18px;
    height: 15px;
    top: 8px;
    left: 50px;
    width: 18px;
    height: 15px;
    background-color:coral;
    background:url(../images/jd-sprites.png) no-repeat -81px 0;
    background-size:200px auto;
}

.slider img{
    width: 93%;
    position: absolute;
    top:89px;
    right:3.5%;
    display:inline-block;
    border-radius:10px;
}
.main-content .slider img{
    display: block;
}
a{
    color:#666;
    text-decoration: none;
}
nav a{
    float: left;
    width: 20%;
    margin-top:45px;
    text-align: center;
}
nav a img{
width: 40px;
margin: 10px 0;
}
nav a span{
    display: block;
    margin:-10px 0 -10px 0;
}
.den a {
    float: left;
    width: 20%;
    margin-top:10px;
    text-align: center;
}
.den a img{
    width: 40px;
}
.den a span{
    display: block;
    margin:-10px 0 -10px 0;
}
.ds{
    width: 92%;
    height: 100px;
    background-color:#ccc;
    margin: 200px auto;
}
.gwc a img{
    width: 20px;
    margin-top: 70px;   
}
.gwc a span{
   
    display: block;
    color:#666;
}
.gwc a{
    float: left;
    width: 20%;
    text-align: center;
}
